MDS PREP
In the extraoral technique for mandibular nerve block the needle after contacting the pterygoid plate is directed
1. Anteriorly
2. Posteriorly
3. Superiorly
4. Inferiorly
Oral Surgery
Answer: 1
In the extraoral technique for mandibular nerve block, the needle is inserted
into the pterygomandibular space anterior to the lateral pterygoid plate and
directed anteriorly to avoid damaging the maxillary artery and other important
structures located posteriorly. The goal is to place the anesthetic solution
around the mandibular nerve before it enters the pterygopalatine fossa.
The blood product of choice for treatment of haemophilics is
1. Fresh blood
2. Cryoprecipitate
3. Fresh frozen plasma
4. Plasma
Oral Surgery
Answer: 2
Cryoprecipitate is the blood product of choice for treatment of haemophilics, as
it is rich in Factor VIII, which is deficient in this condition. It is used to
control bleeding during surgical procedures.
Each of the following statements about local is correct except
1. Lignocaine causes cardiac dysrhythmias
2. Prilocaine is more toxic than lignocaine
3. Bupivacaine is given for obstetrci epitural anaesthesia
4. Both A and B
Each of the following statements about local anaesthesia is correct except: Prilocaine is more toxic than lignocaine.
The onset of action of lidocaine is
1. 1-2 minutes
2. 5-10 minutes
3. 3-5 minutes
4. 7-8 minutes
Oral Surgery
Answer: 3
The onset of action of lidocaine is 3-5 minutes.
Depressed fracture of the zygomatic area may be clinically recognised by
1. Concavity of the overlying tissue in the zygomatic arch area
2. Interference with movements of the mandible
3. Subluxation of condyles
4. Both A and B
Oral Surgery
Answer: 4
Concavity of the overlying tissue in the zygomatic arch area: This indicates a loss of structural integrity due to the fracture.Interference with movements of the mandible: The zygomatic bone plays a role in the overall facial structure and function, and a fracture can affect jaw movement.Both of these signs are indicative of a depressed fracture in this region.
A contraindication to local infiltration technique
1. Hypertension
2. Diabetic patient in whom urine sugar present
3. Infection in the arch
4. Kidney problems
Oral Surgery
Answer: 3
Local infiltration is a safe and effective technique for achieving anesthesia in
most situations. However, it is contraindicated in the presence of infection in
the arch because it can spread the infection further or lead to complications
like an abscess. Hypertension and kidney problems are not direct
contraindications to local anesthesia, but they may require careful monitoring
of the patient's condition. Diabetes with urine sugar present does not directly
contraindicate the use of local anesthetics unless there are severe
complications or neuropathy involved.
Gillies approach for reduction of zygomatic fractures is done through
1. Temporal fossa
2. Infra temporal fossa
3. Infra orbital fossa
4. All of the above
Oral Surgery
Answer: 1
The temporal fossa is located on the side of the skull, above the zygomatic arch and lateral to the orbit. The Gillies approach involves an incision in the temporal region to access the zygomatic bone, which is then manipulated to reduce the fracture and restore its normal anatomical position. This approach is commonly used in oral and maxillofacial surgery for the management of complex zygomatic fractures.
The mechanical advantage obtained from the wheel and axle principle of elevator is
1. 2.5
2. 3
3. 4.6
4. 6
Oral Surgery
Answer: 3
The mechanical advantage obtained from the wheel and axle principle of elevator is 3.